The woman, Angie Lavalais, offered to donate her brother’s kidney because she knew he registered as an organ and tissue donor at ADOT’s Motor Vehicle Division.

Elan Edwards, the man needing the kidney, and Lavalais’ brother were a match, and he survived the transplant.

Donate Life America and its partnered organization created National Blue and Green Day in 2003 to express the need for registered donors and talk about the successes of organ transplants, according to its website.

National Blue and Green Day is only a small part of Donate Life’s initiative to promote registering as organ, eye and tissue donors.